What was found in Fort Collins's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 860 µg/L 22% of the EPA limit 4000 µg/L Main supplier: FT COLLINS CITY OF · 179,901 people · 2019 | 2/10 | SYR4 |
| Chlorite | 330 µg/L 33% of the EPA limit 1000 µg/L Main supplier: FT COLLINS CITY OF · 179,901 people · 2019
Highest in the city: 662 µg/L — SOLDIER CANYON FILTER PLANT · 0 people · 2016 | 4/10 | SYR4 |
| Nitrate | 98 µg/L 1% of the EPA limit 10000 µg/L Main supplier: FT COLLINS CITY OF · 179,901 people · 2019
Highest in the city: 110 µg/L — SOLDIER CANYON FILTER PLANT · 0 people · 2019 | 2/10 | SYR4 |
| Nitrate-Nitrite | 95.6 µg/L 1% of the EPA limit 10000 µg/L Main supplier: FT COLLINS CITY OF · 179,901 people · 2019
Highest in the city: 98.4 µg/L — SOLDIER CANYON FILTER PLANT · 0 people · 2019 | 2/10 | SYR4 |
| TTHM | 46.084 µg/L 58% of the EPA limit 80 µg/L Main supplier: FT COLLINS CITY OF · 179,901 people · 2019
Highest in the city: 61.865 µg/L — SPRING CANYON WSD · 2,320 people · 2019 | 6/10 | SYR4 |
| Chloroform | 31.521 µg/L No EPA limit set Main supplier: FT COLLINS CITY OF · 179,901 people · 2019
Highest in the city: 48.435 µg/L — CSU MAIN AND WEST HOUSING CAMPUS · 27,375 people · 2019 | 6/10 | SYR4 |
| Total Haloacetic Acids (HAA5) | 35 µg/L 58% of the EPA limit 60 µg/L Main supplier: FT COLLINS CITY OF · 179,901 people · 2019
Highest in the city: 42.39 µg/L — SPRING CANYON WSD · 2,320 people · 2019 | 6/10 | SYR4 |
| Dichloroacetic Acid | 14 µg/L No EPA limit set Main supplier: FT COLLINS CITY OF · 179,901 people · 2019
Highest in the city: 22.1625 µg/L — SPRING CANYON WSD · 2,320 people · 2019 | 5/10 | SYR4 |
| Barium | 19.39 µg/L 1% of the EPA limit 2000 µg/L Main supplier: FT COLLINS CITY OF · 179,901 people · 2019 | 2/10 | SYR4 |
| Trichloroacetic Acid | 14 µg/L No EPA limit set Main supplier: FT COLLINS CITY OF · 179,901 people · 2019
Highest in the city: 17.89 µg/L — SPRING CANYON WSD · 2,320 people · 2019 | 5/10 | SYR4 |
| Bromodichloromethane | 3.8 µg/L No EPA limit set Main supplier: FT COLLINS CITY OF · 179,901 people · 2019
Highest in the city: 6.77 µg/L — SPRING CANYON WSD · 2,320 people · 2019 | 6/10 | SYR4 |
| Dibromochloromethane | 5.53 µg/L No EPA limit set Highest in the city: SPRING CANYON WSD · 2,320 people · 2019 | 4/10 | SYR4 |
| Monochloroacetic Acid | 2.1 µg/L No EPA limit set Main supplier: FT COLLINS CITY OF · 179,901 people · 2019
Highest in the city: 4.34 µg/L — EAST LARIMER COUNTY WD · 27,944 people · 2019 | 5/10 | SYR4 |
| Monobromoacetic Acid | 3.28 µg/L No EPA limit set Highest in the city: CSU MAIN AND WEST HOUSING CAMPUS · 27,375 people · 2019 | 4/10 | SYR4 |
| Dalapon | 1.89 µg/L 0.9% of the EPA limit 200 µg/L Highest in the city: SOLDIER CANYON FILTER PLANT · 0 people · 2019 | 1/10 | SYR4 |
| Dibromoacetic Acid | 1.59 µg/L No EPA limit set Highest in the city: SPRING CANYON WSD · 2,320 people · 2019 | 1/10 | SYR4 |
| Selenium | 1.3 µg/L 2.6% of the EPA limit 50 µg/L Main supplier: FT COLLINS CITY OF · 179,901 people · 2019 | 1/10 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 0.9600 µg/L 16% of the EPA limit 6 µg/L Highest in the city: SOLDIER CANYON FILTER PLANT · 0 people · 2019 | 1/10 | SYR4 |
| Bhc-Gamma | 0.0340 µg/L 17% of the EPA limit 0.2000 µg/L Highest in the city: SOLDIER CANYON FILTER PLANT · 0 people · 2019 | 1/10 | SYR4 |
| Lead | 0.0028 mg/L 19% of the EPA limit 0.0150 mg/L Main supplier: FT COLLINS CITY OF · 179,901 people · 2025
Highest in the city: 0.0150 mg/L — SPRING CANYON WSD · 2,320 people · 2025 | 9/10 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Fort Collins
| Supplier | Population served |
|---|---|
| FT COLLINS CITY OF | 179,901 |
| FT COLLINS LOVELAND WD | 63,532 |
| EAST LARIMER COUNTY WD | 27,944 |
| CSU MAIN AND WEST HOUSING CAMPUS | 27,375 |
| SPRING CANYON WSD | 2,320 |
| TIMBER RIDGE MHP | 1,736 |
| SKYLINE | 402 |
| NUEVA VIDA MOBILE HOME PARK | 266 |
| PINEWOOD MOBILE HOME PARK | 65 |
| SOLDIER CANYON FILTER PLANT | 0 |
Frequently asked questions about Fort Collins tap water
Is Fort Collins tap water safe to drink?
EPA testing detected 20 contaminants in the water serving Fort Collins. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Fort Collins?
10 public water suppliers report drinking-water monitoring for Fort Collins, Colorado to the EPA. Each is listed above with its population served.
What contaminants are in Fort Collins's water?
The contaminants EPA monitoring detected in Fort Collins include Fluoride, Chlorite, Nitrate, Nitrate-Nitrite, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.